Local recycling centers, arts and crafts stores, and online auction sites such as eBay.com are all places to sell aluminum can pop tabs. Certain company charities may also give some monetary compensation.
Aluminum can pop tabs are worth roughly 1 cent each, as of 2015. Listings on ebay.com typically include large quantities of the tabs.
Recycling plants may provide higher rates since they are often government-funded and trying to promote recycling in addition to using the scrap metals in the tabs. Local arts and crafts stores also stock aluminum can tabs and may be willing to buy them in bulk.